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Sigma KEE - TimeMeasure
KB Term: 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
time measure
The class of temporal durations (instances of TimeDuration) and positions of TimePoints and TimeIntervals along the universal timeline (instances of TimePosition).
Relationships      
Parents constant quantity A ConstantQuantity is a PhysicalQuantity that has a constant value, e.g. 3 Meters and 5 HourDurations. The magnitude (see MagnitudeFn) of every ConstantQuantity is a RealNumber. ConstantQuantity is distinguished from FunctionQuantity, in that each instance of the latter is formed through the mapping of one PhysicalQuantity to another PhysicalQuantity. Each instance of ConstantQuantity is expressed with the BinaryFunction MeasureFn, which takes a Number and a UnitOfMeasure as arguments. For example, 3 Meters is expressed as (MeasureFn 3 Meter). Instances of ConstantQuantity form a partial order (see PartialOrderingRelation) with the lessThan relation, since lessThan is a RelationExtendedToQuantities and lessThan is defined over the RealNumbers. The lessThan relation is not a total order (see TotalOrderingRelation) over the class ConstantQuantity since elements of some subclasses of ConstantQuantity (such as length quantities) are incomparable to elements of other subclasses of ConstantQuantity (such as mass quantities).
Children time durationAny measure of length of time, with or without respect to the universal timeline.
 time positionAny TimePoint or TimeInterval along the universal timeline from NegativeInfinity to PositiveInfinity.


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